Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56498e179de6613…

MALICIOUS

PDF

74.6 KB Created: 2021-03-09 23:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3ae5ef732ef0b1f960e607e537c5643f SHA-1: a6d25bd8d7f2fc0c57ce1b0a2aa8b9169233fffd SHA-256: e56498e179de6613a10c1df0176ca01caf050a2fcb53393abcca47b0061f7c33
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, with numerous external links, likely to phishing or malware sites, disguised as an invoice or payment lure. The presence of embedded URLs and the PDF structure suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/award?keyword=medicina+ancestral+y+epigenetica+pdf PDF link annotation
    • https://xateboduf.weebly.com/uploads/1/3/1/4/131483383/faefcceb.pdfIn PDF document text
    • https://pakakisokuz.weebly.com/uploads/1/3/1/3/131381756/valopanijudet.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/445978b91b714a.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/5015175.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/5c4532eb.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/favuxiridadifarepamazuwew.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/54866770931.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/eigHijT/58567673357.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/cuisinart_cbk-200c_convection_bread_maker_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/UFYhgrK/81287319479.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/jgQjaDK/facebook_app_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/3XHFLjh/meme_wallpaper_hd_1920x1080_4k_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/bhdhcFM/best_android_app_to_gain_instagram_followers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xolevusafo.myartsonline.com/bluedio_t2_plus_turbine_wireless.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_23e7c702343b45d7af989d6598e3a8ee.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_7b77ea646c2c4c0faa4f2ba5caea6686.pdf?index=trueIn PDF document text
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_551a7d5f3fc74dde921720742da69c4b.pdf?index=trueIn PDF document text
    • http://naxesabefadufu.atwebpages.com/63632573369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0461b311-484d-4c39-a18b-000eaaa818f0/vegetarian_indian_recipes_instant_pot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d67f07-d53a-4f4c-86b1-2f3e8e7e8554/fisher_price_pink_petals_jumperoo_target.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_67dbfd45e419417dbfb793510da2afc4.pdf?index=trueIn PDF document text
    • http://vekemelegewimo.atwebpages.com/75862923542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/738a99eb-448e-47cc-829d-e5ad1fbd6bdb/nakoketufafovasazeju.pdfIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_2bf6ff29c1cc4d6ba67fd226b5201c96.pdf?index=trueIn PDF document text
    • http://sinusudixuxuwad.atwebpages.com/jagej.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50C 5432 bytes
SHA-256: c383932ab9700ec8c26d128a24aff0310c350039d144ffbbe70a3177b1bf2f75
font_01_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 10808 bytes
SHA-256: 39c3c036689e41c011a4dd8f08ec453ae205a5630937d61d4011800730a74884